From: Tom Lane <tgl@sss.pgh.pa.us>
To: Michael van Rooyen <michael@loot.co.za>
Cc: pgsql-performance@postgresql.org
Subject: Re: Slow queries on 9.3.1 despite use of index
Date: Mon, 28 Apr 2014 19:06:06 -0400
Message-ID: <30075.1398726366@sss.pgh.pa.us> (raw)
In-Reply-To: <535EC680.6010102@loot.co.za>
References: <535E8BFF.1010503@loot.co.za>
<23166.1398707420@sss.pgh.pa.us>
<535EC680.6010102@loot.co.za>
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Michael van Rooyen <michael@loot.co.za> writes:
> On 2014/04/28 07:50 PM, Tom Lane wrote:
>> Hm ... it seems pretty suspicious that all of these examples take just
>> about exactly 1 second longer than you might expect. I'm wondering
>> if there is something sitting on an exclusive table lock somewhere,
>> and releasing it after 1 second.
> I do have log_min_duration_statement = 1000, which may cause this.
Ah, I overlooked that detail. Never mind that theory then. Although
it might still be worth turning on log_lock_waits for awhile, just to
eliminate the possibility of lock-induced delays.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, michael@loot.co.za
Subject: Re: Slow queries on 9.3.1 despite use of index
In-Reply-To: <30075.1398726366@sss.pgh.pa.us>
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